考虑闸墩弹性效应的弧形闸门流激振动数模-物模联合预测与安全分析

Joint Prediction and Safety Analysis of the Flow-induced Vibration of Radial Gate Through Physical and Numerical Simulations Considering Effects of the Pier

通过试验和数模对闸门流激振动响应仿真模拟是研究闸门振动的一种有效方法。以某水电站泄洪底孔弧形闸门为具体研究对象,根据模型试验要求设计了水力学和水弹性模型,进行了支铰力荷载量测和流激振动响应试验,分析了泄流条件和闸门、闸墩振动的关系,同时将试验所得荷载分别施加于闸门—闸墩耦合数值模型和将闸墩处理成刚性约束的数值模型进行动力响应计算。通过对比分析,认为闸墩振动对闸门动应力和垂向动位移影响较小,但对闸门水平向和侧向动位移影响较大。最后结合数模和物模对闸门振动进行了安全分析。

The flow-induced vibration response simulation of gate through model experiment and numerical model is an effective method to investigate the gate vibration problem .In this paper ,the spillway under-port radial gate of a hydropower station was studied .A hydraulic model and a hydro-elastic model were designed according to the physical model experiment requirements . The hinge force measurement and the response of dynamic stress and displacement of flow-induced vibration of the gate were tested .The relationship between the hydraulic condition and the vibrations of pier and gate was analyzed .The test load was ap-plied to the coupled gate-pier numerical model and the gate model in which the pier was treated as rigid constrain for dynamic a-nalysis ,respectively .The results showed that the pier vibration has insignificant impacts on dynamic stress and vertical dynamic displacement of the gate ,but has significant impacts on the horizontal and lateral dynamic displacement of the gate .Finally ,the dynamic safety of the gate was analyzed using the physical and numerical model .